One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,7)(4,5)(6,8)(9,10,14,15)(11,16,12,13)(17,18)(19,23)(20,24)(21,22)(25,26)(27,30)(28,29)(31,32)(2,5)(6,7)(9,11,14,12)(10,13,15,16)(17,18,21,22)(19,23,24,20)(26,29)(30,32)(9,10,14,15)(11,16,12,13)(17,19)(18,20)(21,24)(22,23)(25,27,28,31)(26,30,29,32)(1,3)(2,6)(4,8)(5,7)(9,12,14,11)(10,13,15,16)(17,20)(18,19)(21,23)(22,24)(1,2)(3,6)(4,5)(7,8)(9,13)(10,11)(12,15)(14,16)(17,18)(19,20)(21,22)(23,24)(25,26)(27,30)(28,29)(31,32) involution — undirectedA Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.